Assembling jig



Aug. 30, 1932. .i. c. bAWSON ASSEMBLING JIG Original Filed Dec. 6. 1930 spring plate 11, havin the plate.

Patented Aug. 30, 1932 PATENT 1, r es JAMES c. DAWSON, F WEBSTER GROVES, MIsSoUB nssI G oB To ELMh n. Dawson,

0E WEBSTER GROVES, ivrissoonr ASSEMBLIES 'JIG Original application filed December 6, 1930, Serial No. 500,449, Patent.I To. 1,842,249, January'19, 1932.

Divided and this application filed December 21,1931. Serial No. 582,313: a

The invention relates to jigs especially adapted for the assembling of a certain type of loose leaf binder mechanism, and this application is a division of my pending application Serial No. 500,449, filed December 6, 1930 and patented January 19, 1932, Number 1,842,249, on Method and apparatus for manufacturing loose leaf binders.

The objects and preferred form of construction of the invention will be best set out in the following description.

In the drawing: 7

Figs. 1, 2 and 7 illustrate forms of binder mechanism in connection with the manufacture of which the improved jig is employed;

Fig. 3 is a detail plan view of the jig;

Figs. 4 and5 are sectional views, respectivcly, on the lines 4-4 and 55 of Fig. 3; and

Fig. 6 is a View Similar to Fig. 5, slightly H modified.

In the form of binder mechanism in connection with the manufacture of which the improved jig is employed, there is present a its margins inturned, as shown at 37 Fig. 6), a pair of arch wires 12, 13, being held within the downturned margins and having their end portions brought into engagement to form tog 'le joints and then bent to form a half of s: a binding ring, as shown at 16, 17 these ring sections extending through apertures 18 Intermediate of the end rmgs is a third sectional ring 14, the inner ends of the 1 two sections being pivotally united, as plainly shown in Figs. 2, 5, 6 and 7. Each of these ring sections 14 is permanently attached to one of the wires 12, 13, and extends through apertures in the plate 11 which correspond to the apertures 18.

The manufacturing problem which is solved by means of the improved jig was in the assembling of the parts of the binder, the proper positioning of the sections of the ring 14 preliminary to their attachment to the wires 12, 13, in order that the three rings should close simultaneously.

The jig consists of a metal block 19, hav- A ing transverse apertures in its upper face spaced to receive the ringelements 16, 17,

when the latter are assembled with'the plate I formed in blocks," as 40, fitting withinre- 6o cesses in the block 19. Midwaybetween the described apertures the block-19 .is apertured in itsiupper' face, as indicated at 41;".the walls of this aperture extending lengthwise ofthe block being provided with instanding shoulders 25, formingtracks upon which. a

pairof blocks 23, 24, are'slidably mounted. The adjacent faces of the last-named blocks are recessed to'receive between them the ring Sections14, these recesses being provided withstraight walls 29', and arcuatewalls 28 correspondingwith-the walls21, 22,-each recess being crossed at itsbottom by a short guide plate 27. I 7 I The several elements of the binderbeing roughly assembled, the rings 14,:15"and.17, however, being open, the binder is inverted and applied to'the jig, the prongsof the =several rings being forced into its apertures and thereby closed 'together but for the spacing due to contact with the plates '26, 27. Thus the central ring 14 is accurately positioned with reference to the end rings. The blocks 23, 24, are now closed firmly together and sage of current the welding action takes place between the ring sections and the wires 12,13, at the points 35, 36. The electrode 31 is arched, as shown at 32, to prevent con- "ion.

2 v x r 1,874,088

The attachment having been accomplished, the binder mechanism is withdrawn from the jig, whereupon, by reason of the spring action of the plate 11, the sections of the 5 several rings are closed together. 7

The improved jig is capable of use in connection with other forms of the type of binder illustrated, as, for example, the form constituting the subject-matter'of my pend- ]O ing application Serial No. 519,945, filed March 4, 193 1, for improvements in loose leaf binders. I claim as my inventionp p 1. In an assembling jig forloose leaf 15 binders, a metal body having transverse slots of arcuate form for receiving the elements of the binder rings andforcing them together, and spacing plates at the bottoms of the slots for engagement by the ends of 30 such elements.

2. In an assembling jig vfor loose leaf binders comprising a pair of arch wires having integral sheet-holding prongs and an intermediate pair of cooperating prongs attached to the wires, a metal body having transverse arcuate. slots for receiving the first-named prongs and an intermediate aperture, a pair of clamping blocks mounted within the aperture and having mating ar- :so cuate grooves in their adjacent faces which together form a groove for receiving the intermediate prongs, and spacing plates crossing the slots and groove.

3. In :an assembling jig for loose leaf -35 binders comprising a spring plate, wires pivotallyfheld bythe marginal portions of the plate, and a plurality of jointed openable holding rings carried by the wires, a metal bodyhaving transverse arcuate slots for re- 10 ceiving the free ends of the ring elements, and spacing abutments at the bottoms of the slots.

- In testimony whereof I afix my signature.

as i JAMES o. DAWSON. 

